How ACE inhibitors work

As the name suggests, ACE inhibitors inhibit an enzyme called angiotensin-converting-enzyme (ACE). ACE acts to convert the hormone angiotensin 1 into another hormone called angiotensin 2.

Angiotensin 2 is known to increase blood pressure by three different mechanisms:

It acts as a vasoconstrictor, a molecule that causes blood vessels to narrow so as to increase blood pressure.

It stimulates the release of a hormone called aldosterone that promotes the retention of sodium and chloride ions. Higher sodium chloride or salt concentrations in the blood increase the volume of the blood, subsequently leading to a rise in blood pressure. Aldosterone also increases the excretion of potassium.

It breaks down a protein called bradykinin, which is known to dilate or widen blood vessels. Bradykinin’s loss can cause blood pressure to rise.

By lowering the levels of angiotensin 2, ACE inhibitors reduce blood pressure. Their effect on blood pressure by stabilizing bradykinin, however, remains to be proven.

Other blood-pressure-lowering medications do not show the same protective benefits to the kidneys as ACE inhibitors. Scientist for this reason suggest that ACE inhibitors may aid kidney function by additional mechanisms. For example, they are known to lower the glomerular filtration pressure. They also decrease the permeability of the glomeruli, the small blood vessels in the kidneys the filter waste products from the blood. Both mechanisms are thought to prevent proteinuria.

Additional information

Because ACE inhibitors work to retain potassium, potassium-rich foods, such as dairy products, salt substitutes, nuts, and certain fruits and vegetables should be avoided while taking these medications.

ACE inhibitors are usually well-tolerated and can be safely used in children. Possible side effects include fatigue, dry cough, headaches, dizziness, and loss of taste.

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Alport Syndrome News is strictly a news and information website about the disease. It does not provide medical advice, diagnosis or treatment. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.

Disclaimer:

Alport Syndrome News is strictly a news and information website about the disease. It does not provide medical advice, diagnosis or treatment. This content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.

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